Fuel-saving device



June 24, 1930.. N. J. RUSSELL 1,756,191

FUEL SAVING DEVICE l Filed May 1s, 1929 2 sheets-sheet. 1

ml-0 71x71 111111114 A A L11/1111111111? l' June 24, 1930.

N. J. RUSSELL FUEL sAvING DEVICE Filed M ay 16. 1929 2 Sheets-Sheet 2 Wwf/@y Y 1l) 18. Said wallimeans 20 is'preferably formed integral With the casing wall `and cent the outer Wall of the casing, `around said webs, as indicated by the arrows in Fig.

2. Said means 16 provides a main or inner heating chamberor expansion chamber 19. l

The casing is provided'with a cross-wall or cross-partition means 20, Which is ps itioned at the junction of the main tubular y part o f the casing and its head 14 and serves as a deflecting means to deflect the air which flows forwardly along the outside ofvvebs forms vwith r-liead 14 a'discharge chamber or'outer expansion chamber 21. A' slot 22 is pro-V `'vided centrally across this wall, and Vflanges or bars 23 extend, backwardly and flare out-v Y, wardly from its edges into expansiony chamn ber-.19. 'Saidfflared flanges or bars 23 on Y 4Wall 20 providea compression or contraction channel 22 for compressing and restricting the flowof air therethroughan'd they Overlap*V the webs or flanges'18 a distance iin-1v wardly thereof ;V so as to vcause the current of air in its flow through inlet 13 and along the outer sides of websV 18 to'be deflected `by saidjwall 2O rearwardly between its v flanges 23and saidwebs 18,'into the main kor inner-heating chamber V'19, wherein said Vair is then highly heated-and vvisre'stricted or f retarded in its flowwiforwardly 'y therefrom yf'through the contraction channel'f22'between Y the sion'chamber 21 wherefrom it is discharged `Vthroughthe boresor outlet fopenings S15, as

flared flanges 23, linto the outeneXpanindicated in` Fig.' 2.

vThe means for mounting j'my improved "fuel saving device in aheating plant will be adapted `to suit/the:particular occasion, and

Yin Figs. 1 to 3g this mounting means for mounting the device inthe fire-box 24 of a horizontal flue .boiler y25VY comprises'flangel vmeans'or bracket means, 26 extending transversely or substantially 'radially outwards fromfneckg' 12, yand said bracket means is preferably fastened or secured to the inner f jside ofthe door l2"( with elements orbolts 3 28, so as Vto extendfinto the fire-box'aiid'dis-Y Vcharge'the preheated air thereinfa short distance abovel the burning fuel,"v aboutV as,Y

indicated in Fig. 1. The air enters through the usual openings 29 Vin door 27, to passv 'thro'ugh'neck 12 intothe casing(l Y In Figs.f`4 and V5 another fo'rmrof mounting means is shown, `which isvr adapted for KV'comprises a .pipe or'- tubular membery "30 vwhich is attached to the Vtubular neck 12 ofl the 'casing 10. Thisk attachment or connec-k adjustable, Y c said neck, and 'having' a collar 31 threaded mountinggmy improved device inV a hot-air furnace. This mounting meansfpreferably tion is preferably made to beV removable and as by' threading said pipe in on said pipe to press a metal washer `32 and thereby an asbestos-washer 33 firmlyv against the outer side ofthe wall of the ',re-bOX.

34 of the furnace; so that the annular flange Vor rear wall 11 of the casing will be drawn tightly against the inner side of said fire# box wall, and at they same time the hole provided in the latter and containingvsaid neck 12 will be closedsair-tighu'and said Vcasingfwill be held firmly in position in theU ire-boX to discharge the preheated air through the `outlet openings 15 in the head 14 into said fire-boX adjacentrthe burning fuel therein. i i

The tubular member gorr pipe30` is made.,y

of' a length suitable to extend fromthe neck 12 in wall 34-through the air space inthe furnace and through the outer furnace housing or shell 35, to take in the air in its inlet end 30 35. Said'pip'e'is Vpreferably held firmly and vair-tight in the Vshell by means of a` collar or 4ring 36 and a set-screw37 therein which press, a fibre .washer B8-tightly against 'theV shell. A' *This casing 10 comprises thegchannelshaped Ypartition means ..16, and! the .crosswall 20 having the flared In this improved vfuel saving device,v conf structe'd4 `ini accordance withV my' invention Y.

as disclosed herein,rand installed .as indi-V ;cated, theflow of preheated air is self-regulated yor the feeding thereof is automatically regulated by the change or variationof thel Y' z 100 When the temperaturek outside of theheat-Y temperature in the vfire-boX. f

ing plantis equal to boXor When -there. is no: fire v in, then there is 'no current or flow through the nre-box is that withinVV the fireof air burning and ,theY temperature flanges 23 .thereon which eXtendbetween v.the -Webs l18 of said partition means, thesame ing' form n above described.

burning theredevice. When the v,iii-ein the rises therein, then the fair'flowsthrough-*the device,

deflected, by the bight f1751'of' the :channelshaped means '16, to flowalong theouter substantially as^indicated in/Fig.2. :Therair entering through-air inlet'13vis firsty sides of the Webs 18`and have its temperature ji considerably increased, Vandais then deflected and reversedk in'its course by the crossswall 2O and the 'flanges' 23,.entering the main: or rinner heating' chamber whereinit'is su- 'perheatedand expands? The direction of`-i'ts channel 22 between thevfiared flanges 23, being compressed and restrictedV in Sitsfiow therethrough, and therefrom flowing and eX- course is then againreversed,`and aga-in@ flows forwardly, fthroughthe compression Y panding into the outer-expansion chamber y 21, whence .it4 flows outward through vthe outlet openings 15 into the y combustion '125i l chamber or space 'above vthe burning fuel in the fire-box, substantially as'indicated 'in the drawings. This'repeated deflected and reverse flow around webs 18and flangesf23,

and throughv the restriction or compressionA channel 22, causes the air toy flow from this device Very slowly while the heat is-low in the fire-box and While but little air needs to be added to the burning fuel in the irebox; however, as the consumption of the fuel and the heat in they tire-box increases, the temperature in the two expansion vchambers 19 and2l also greatly increases, and` thereby forces lthelow ofthe preheated air with greater speed out through the outlet openmingle with the increased volumeof burning'fuel gases arising fromthe burning fuel in the regbox. The rate ofrlowof` airy throughmy improved device is thus in-f` .creased and decreased automatically by the ings 15 into the combustion chamberto j slot and being in spaced relation with 'the l inner parts of said partition webs, and hav-k ing their sides integral with the casin`g, and `aroundedhead with outlet openings therein extending fromv said transverse bafflev to forthe casing. I

In testimony whereof I name to this specification.

increase and decrease of the vtemperature in the lire-box, and in accordance withy the requirement of preheated air therein.v

I am aware that various'changes may be made Vin detail ofyconstructiom without departingV from the spirit ofthe vinvention herein, and I do not patent granted hereon, except yas may be ynecessitated by the prior patents and art.

NiiLsoN J. RUSSELL.v

70 form therewith an outer expansion chamber v have signed l purpose ylimiting the What I claim asmy invention and desire to secure by Letters Patent is: v l. A fuel saving device in the form of a casing having at one endair inlet means and l c means for mounting it in a.y heating plant, baffle means within the casing, extending entirely across the same and having its Vends integral therewith and its sides spaced therefrom, partition webs integral with. andextending inwardly from the sides of said baffle means and having their sidesvintegral with the casing, to provide a main expansion chamber, a transverse baffle integral with the wallsl of the casing 'and spaced ,from the inner ends ofy said. webs, said transversey baille having a centralslot, diverging webs v extending outwardly from the edges of said slotand being in spaced lrelation with4 said Y bathel means and said partition webs, andv having their sides integral with the casing, and a rounded head with outlet openings therein to form with said transverse balifley an outer expansion chamber.

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2. Aiuel saving device consisting of a I inner ends of said Webs, said transverse baffle having a central slot, divergingwebs extending outwardly from the' edges of saidV extending entirely integral with; the

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